Question 196686 in Ubuntu Question posted in
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Ubuntu 22 cannot find .NET Core

When I run dotnet build, I get

You must install or update .NET to run this application.

App: /usr/share/dotnet/sdk/7.0.305/dotnet.dll
Architecture: x64
Framework: 'Microsoft.NETCore.App', version '7.0.8' (x64)
.NET location: /usr/share/dotnet/

No frameworks were found.

Learn about framework resolution:
https://aka.ms/dotnet/app-launch-failed

To install missing framework, download:
https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=7.0.8&arch=x64&rid=ubuntu.22.04-x64

but when I run dotnet --info I get

$ dotnet --info
You must install or update .NET to run this application.

App: /usr/share/dotnet/sdk/7.0.305/dotnet.dll
Architecture: x64
Framework: 'Microsoft.NETCore.App', version '7.0.8' (x64)
.NET location: /usr/share/dotnet/

No frameworks were found.

Learn about framework resolution:
https://aka.ms/dotnet/app-launch-failed

To install missing framework, download:
https://aka.ms/dotnet-core-applaunch?framework=Microsoft.NETCore.App&framework_version=7.0.8&arch=x64&rid=ubuntu.22.04-x64

Host:
  Version:      7.0.5
  Architecture: x64
  Commit:       8042d61b17

.NET SDKs installed:
  6.0.411 [/usr/share/dotnet/sdk]
  7.0.305 [/usr/share/dotnet/sdk]

.NET runtimes installed:
  No runtimes were found.

Other architectures found:
  None

Environment variables:
  DOTNET_ROOT       [/usr/lib/dotnet]

global.json file:
  Not found

Learn more:
  https://aka.ms/dotnet/info

Download .NET:
  https://aka.ms/dotnet/download

My projects are using .NET Core 6, but I have "DOTNET_ROLL_FORWARD": "Latest" in my launch.json.

How can the SDK be installed but no runtimes — but they are because I can run dotnet --info.

I did notice that when I run which dotnet I get /usr/bin/dotnet and that is different than the value of DOTNET_ROOT, but I don’t know if that’s something else.

What’s weirder, is this has been working – it just started doing this and I cannot figure it out.

The https://aka.ms/dotnet/app-launch-failed URL was not helpful.

Tags:

2

Answers


  1. 0

    I also encountered the same issue.

    Initially, I installed the .NET environment, according to the Microsoft instructions:

    https://learn.microsoft.com/en-us/dotnet/core/install/linux-ubuntu#register-the-microsoft-package-repository

    Then I used this command:

    sudo apt install aspnetcore-runtime-7.0 aspnet-runtime-7.0 dotnet-sdk-7.0

    But after some time it stopped working and was complaining about the missing framework:

    No frameworks were found.

    Last time I removed dotnet and installed it again, and it helped me.

    But now I encountered that issue again, and I suspect that there is some incompatibility between the dotnet SDK and environment. So, when the SDK is updated and the runtime has an older version, it stops working.

    This time, I downloaded the runtime here as the terminal output suggests:

    https://dotnet.microsoft.com/en-us/download/dotnet/7.0

    Then I manually replaced all the files in the /usr/share/dotnet folder. And it is working for me again.

    If I encounter that issue again, I will confirm if that is a workaround that always helps.

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  2. 0

    I have the same issue, it never worked for me even though the installations are "successful" when i write this in my shell:
    ./dotnet-install.sh –version latest –runtime aspnetcore

    I check my PATH and i have this: /home/tetratrux/.dotnet/tools

    So if anyone has an idea … 🙂

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